LONGMONT — For the second time in two years, the Federal Deposit Insurance Corp. has issued a formal warning to Mile High Banks regarding problems with its balance sheet.

The bank is “significantly undercapitalized” and has an “unacceptable capital-restoration plan,” according to an FDIC Corrective Action Directive, which was issued to the bank Dec. 1 but not made public by the FDIC until Friday.

“The bank’s rapidly deteriorating capital condition, the bank’s unacceptable capital-restoration plan and the inability of bank management to return the bank to a safe and sound condition require that the FDIC immediately take prompt corrective action,” reads the directive, which references correspondence with the bank dating back several months.

In one such letter, dated Aug. 15, the FDIC deemed “unacceptable” a capital-restoration plan that the bank filed.

Subsequent correspondence did not alleviate the situation, which led to the Dec. 1 directive.

Mile High’s president and chief executive, Dan Allen, could not be reached for comment Monday.

The directive said the bank must comply within 30 days by taking specific actions to improve its financial condition.

David Barr, a spokesman for the FDIC, said Monday that he couldn’t comment on the 30-day period other than to say that such orders are issued “to work with a financial institution.”

He also noted that because Mile High was not a national institution, any corrective action would be taken by the Colorado Division of Banking — although the bank’s deposits are federally insured.

Fred Joseph, the state’s banking and securities commissioner, said that as long as an institution is making a good-faith effort to bolster its capital, the FDIC will work with it.

A customer dining at Washington’s Oceanaire restaurant noticed an unusual line at the bottom of his receipt: “Due to the rising costs of doing business in this location, including costs associated with higher minimum wage rates, a 3% surcharge has been added to your total bill.”